import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import router from '@/router'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: '/api',
  // withCredentials: true, // send cookies when cross-domain requests
  //timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    config.headers['Access-control-Allow-Origin'] = 'Origin';
    config.headers['Access-Control-Allow-Headers'] = 'Access-Control-Allow-Headers'
    if (store.getters.token || getToken()) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor

service.interceptors.response.use(
  
  response => {
    const headers = response.headers
    //console.log(headers['content-type'])  将打印的值，也将后台返回的相应头设置成相同的，我的就是'application/octet-stream;charset=UTF-8',然后返回response
    if (headers['content-type'].indexOf('application/octet-stream') != -1) {
        return response;
    }
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })
    if(res.code == 401){
      router.replace('/login')
    }
      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

export default service
